AppleScript help

[Ian Summerfield]

I can't get my OS X system to shut down the power to the Mac:

Do "tell app " & quote & "Finder" & quote & " to shut down" as applescript

It doesn't work, revolution itself cancels the shut down because it's too
busy waiting for a result from AppleScript to do the quit!  Can I fire off
AppleScripts without waiting for the response?

Has anyone a better way to power off?  I get a message from my UPS that I
have only ten minutes battery left and I want to cleanly shut down the
system.

-i-